FIELD: radio communication, radio engineering. SUBSTANCE: invention refers to communication system in which data were coded in receiver with variable speed of transmission of data. Data are received in the form of symbols arranged in groups of data. If data are transmitted at full speed group of data is filled with symbols. If data are transmitted with speed lesser than full speed symbols are repeated within group of data till group of data is filled or symbols are arranged individually separated one from another by intervals within group of data. With speed of coding equal to one fourth, for instance, of full speed each symbol in group of data is repeated four times or data are transmitted during one quarter of time. Received groups of data are decoded, for example, by decoder and are coded anew by encoder with every possible speed of transmission of data. Comparator compares symbols coded again with symbols received first and counter counts number of errors in symbols. Each decoding process forms indication of quality of decoding process which can include results of test with the use of cyclic excess code or Yamomoto Quality Metric. Counted errors and indication of quality form metric of errors fed to processor or microprocessor. Processor analyses metric of errors per each speed of transmission of data and determines most probable speed with which coming signals were coded. EFFECT: diminished distortion in reception of data transmitted at variable speed without reception of information on speed from transmitter by receiver. 47 cl, 4 dwg
